#Question id: 11075
#Unit 7. System Physiology – Animal
A 65-year-old man with emphysema due to 34 years of cigarette smoking is admitted to hospital due to dyspnea. With further tests the mean pulmonary arterial pressure is determined to be 45 mm Hg at rest. He is hypoxic (PO2 = 49 mm Hg), hypercapnic (85 mm Hg), and slightly acidotic. The cardiovascular and oxygen changes are due to which of the following?
#Question id: 3291
#Unit 11. Evolution and Behavior
Which of the following is the most predictable outcome of increased gene flow between two populations?
#Question id: 19071
#Unit 6. System Physiology – Plant
#Question id: 27491
#Unit 1. Molecules and their Interaction Relevant to Biology
The observed rotation of 10.0g of Compound (X) in 50mL of solution in a 20-cm polarimeter tube is +2.3° at 20 °C, what is the specific rotation of the compound?
#Question id: 725
#Unit 1. Molecules and their Interaction Relevant to Biology
At 25°C values of [θ]222, the mean residue ellipticity at 222 nm, are - 33,000 and -3,000 deg cm2 dmol-1 for a polypeptide existing in α- helical (α) and β-structure (β), respectively. If this polypeptide undergoes a two-state heat-induced α-β transition, and a value of [θ]222 = -15,000 deg cm2 dmol-1 is observed at 60°C, then this observation leads to the conclusion that the α helix conversion to β- structure is: